# SDR CALA2014061391255

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 9, 2014
- Submitted: June 13, 2014
- Operation: Air carrier
- Aircraft: [N795UA](https://openairdocs.org/aircraft/N795UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26927
- Aircraft time: 73,279 hours, 10,309 cycles
- Engine: Pwa PW40903
- System (JASC): [2424 · AC Regulator](https://openairdocs.org/jasc/2424)
- Part: Gcu
- Condition: Faulty
- Location: Right
- Stage of operation: UK
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2014061391255

## Discrepancy

CREW REPORT ELEC GEN SYS STATUS MSG DISPLAYED, ALSO ELEC BUS ISOLATION LT & ELEC BUS ISOLATION RT ADVISORY MSGS DISPLAYED.  REPLACED RT GCU & BPCU IAW MM24-41-05, 24-22-02.  CONFIRMED S-W LOAD OKAY.  RAN ELECT SYS CHECK WITH EXT POWER, APU & ENGS.  FREQS VOLTS & LOAD CHECKED GOOD.  GEN & BUS CTL & IND CHECKS GOOD, NO FAULTS NOTED.  CONFIRMED BOTH ENG IDG & BUGS OIL SVC WERE GOOD.

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